Battery powered personal navigation device and GPS receiver products require an external interface for power and charging. The rechargeable Li-Ion/polymer batteries are charged at high current levels and require a stable power source.

Personal navigation devices use single color and multicolor RGB LEDs as function indicator lamps. Dedicated GPS receiver modules that do not have an LCD display use indicator lamps to signal power up and GPS signal capture or other operating functions.

Multicolor RGB LEDs are often used for all of these stated purposes.

RGB LED drivers provide programmable control of LED color and brightness in an ultra small footprint package.

3-channel RGB LED drivers permit custom color and brightness control

4-channel RGBW devices allow for driving a white LED in addition to the RGB LED.

Programming interface options include Express Wire or I2C to ease integration with a wide variety of processors and operating systems.

In cases point of load regulation is needed application circuits located a distance from the PMIC or in cases where a needed voltage rail is unavailable, over-voltage and surge protection ICs can solve the issue.

GPS receiver modules may not use a PMIC as they are simplified function devices, but still require regulated voltage supplies from the variable voltage battery source.

For high efficiency single output supply voltage requirements, a DC/DC switching step-up or step-down regulators can provide the needed application solution.